Office chair



FIG. 1 is a front elevational view;

FIG. 2 is a rear elevational view;

FIG. 3 is a left elevational view;

FIG. 4 is a right elevational view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view;

FIG. 7 is a front perspective view; and,

FIG. 8 is a rear perspective view.

CLAIM The ornamental design for an office chair, as claimed anddescribed.